NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Boundary force method for analyzing two-dimensional cracked platesThe Boundary Force Method (BFM) was formulated for the two-dimensional stress analysis of complex crack configurations. In this method, only the boundaries of the region of interest are modeled. The boundaries are divided into a finite number of straight-line segments, and at the center of each segment, concentrated forces and a moment are applied. This set of unknown forces and moments is calculated to satisfy the prescribed boundary conditions of the problem. The elasticity solution for the stress distribution due to concentrated forces and a moment applied at an arbitrary point in a cracked infinite plate are used as the fundamental solution. Thus, the crack need not be modeled as part of the boundary. The formulation of the BFM is described and the accuracy of the method is established by analyzing several crack configurations for which accepted stress-intensity factor solutions are known. The crack configurations investigated include mode I and mixed mode (mode I and II) problems. The results obtained are, in general, within + or - 0.5 percent of accurate numerical solutions. The versatility of the method is demonstrated through the analysis of complex crack configurations for which limited or no solutions are known.
Document ID
19880059770
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Tan, Paul W.
(Analytical Services and Materials, Inc. Hampton, VA, United States)
Raju, Ivatury S.
(Analytical Services and Materials, Inc. Hampton, VA, United States)
Newman, James C., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Subject Category
Structural Mechanics
Accession Number
88A46997
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available